For one, follow the 1-2-3-4 model:
1 part lime juice (sour)
2 parts cream of coconut (sweet)
3 parts Cruzan Rum (strong)
4 parts pineapple juice, perhaps diluted with some water (weak)
For a batch:
1 empty gallon jug
Either 2 cups Cruzan dark rum or 1 cup dark rum and 2 cups vanilla rum (for the Nilla Killa)
1 15oz can of Coco Lopez Cream of Coconut
32 oz of Orange Juice
32 oz of Pineapple Juice
32 oz of Mango Juice
fresh grated nutmeg
Put tge rum and Coco Lopez in first, then fill up the jug with the juices.
You can also leave the rum out and let people mix their own.